博客资源下载问题

app/helpers/application_helper.rb

@@ -1934,6 +1934,8 @@ module ApplicationHelper
         candown = true
       elsif attachment.container.class.to_s=="StudentWork"
         candown = true
+      elsif attachment.container.class.to_s=="BlogComment"
+        candown = true
       elsif attachment.container.class.to_s == "User"
         candown = (attachment.is_public == 1 || attachment.is_public == true || attachment.author_id == User.current.id)
       elsif  attachment.container_type == "Bid" && attachment.container && attachment.container.courses